Thrown blood and stolen luck - a Newfoundland superstition

Recently, I came across this quote linking blood and luck:

"The settlers had many superstitions and were obsessed by a belief in the presence of ghosts. It was common to hear of a man, who, while rowing across the harbor, had seen a phantom French ship, with many soldiers aboard, also crossing. Others had seen an Indian ghost following them from one settlement to another. Their superstitions were legion and I shall mention only one. During the seal hunt if a successful hunter saw anybody throwing blood out of his boat into the boat of another, a fight was sure to follow because the hunter believed that his luck was being stolen."

- from J. Morgan, "Recollections of Harbour Deep," September 1957, page 5, Atlantic Guardian Vol 14, no 9

Has anyone come across this folk belief before? If so, drop me a line at ich@heritagefoundation.ca.

- Dale Jarvis